6.配置IP和hosts、hostname
（1）配置ip
//这里的网关有vmware中网络设置决定，eth0为连接外网，eth0内网心跳
//rac1主机下：
[root@rac1 ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0
IPADDR=192.168.248.101
PREFIX=24
GATEWAY=192.168.248.2
DNS1=114.114.114.114
[root@rac1 ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth1
IPADDR=192.168.109.101
PREFIX=24
//rac2主机下
[root@rac2 ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0
IPADDR=192.168.248.102
PREFIX=24
GATEWAY=192.168.248.2
DNS1=114.114.114.114
[root@rac2 ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth1
IPADDR=192.168.109.102
PREFIX=24
（2）配置hostname
//rac1主机下
[root@rac1 ~]# vi /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=rac1
GATEWAY=192.168.248.2
NOZEROCONF=yes
//rac2主机下
[root@rac2 ~]# vi /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=rac2
GATEWAY=192.168.248.2
NOZEROCONF=yes
（3）配置hosts
rac1和rac2均要添加：
[root@rac1 ~]# vi /etc/hosts
192.168.248.101 rac1
192.168.248.201 rac1-vip
192.168.109.101 rac1-priv
192.168.248.102 rac2
192.168.248.202 rac2-vip
192.168.109.102 rac2-priv
192.168.248.110 scan-ip
7.配置grid和Oracle用户环境变量Oracle_sid需要根据节点不同进行修改
[root@rac1 ~]# su - grid
[grid@rac1 ~]$ vi .bash_profile
需要注意的是ORACLE_UNQNAME是数据库名，创建数据库时指定多个节点是会创建多个实例，ORACLE_SID指的是数据库实例名
[root@rac1 ~]# su - oracle
[oracle@rac1 ~]$ vi .bash_profile
$ source .bash_profile使配置文件生效
8.配置oracle用户ssh互信这是很关键的一步，虽然官方文档中声称安装GI和RAC的时候OUI会自动配置SSH，但为了在安装之前使用CVU检查各项配置，还是手动配置互信更优。
ssh-keygen -t rsa ssh-keygen -t dsa [oracle@RAC1 ~]$ ssh rac1 cat ~/.ssh/id_rsa.pub >> authorized_keys ssh rac2 cat ~/.ssh/id_rsa.pub >> authorized_keys ssh rac1 cat ~/.ssh/id_dsa.pub >> authorized_keys ssh rac2 cat ~/.ssh/id_dsa.pub >> authorized_keys [oracle@RAC1 .ssh]$ scp authorized_keys rac2:~/.ssh/ [oracle@RAC1 .ssh]$ chmod 600 authorized_keys ssh rac1 date ssh rac2 date ssh rac1-priv date ssh rac2-priv date需要注意的是生成密钥时不设置密码，授权文件权限为600，同时需要两个节点互相ssh通过一次。
9.配置裸盘使用asm管理存储需要裸盘，前面配置了共享硬盘到两台主机上。配置裸盘的方式有两种（1）oracleasm添加（2）/etc/udev/rules.d/60-raw.rules配置文件添加(字符方式帮绑定udev) （3）脚本方式添加(块方式绑定udev，速度比字符方式快，最新的方法，推荐用此方式)
在配置裸盘之前需要先格式化硬盘：
fdisk /dev/sdb Command (m for help): n Command action e extended p primary partition (1-4) p Partition number (1-4): 1 最后 w 命令保存更改重复步骤，格式化其他盘，得到如下分区
[root@rac1 ~]# ls /dev/sd*
/dev/sda /dev/sda2 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1 /dev/sdf1 /dev/sda1 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf
添加裸盘：
[root@rac1 ~]# vi /etc/udev/rules.d/60-raw.rules ACTION=="add",KERNEL=="/dev/sdb1",RUN+='/bin/raw /dev/raw/raw1 %N" ACTION=="add",ENV{MAJOR}=="8",ENV{MINOR}=="17",RUN+="/bin/raw /dev/raw/raw1 %M %m" ACTION=="add",KERNEL=="/dev/sdc1",RUN+='/bin/raw /dev/raw/raw2 %N" ACTION=="add",ENV{MAJOR}=="8",ENV{MINOR}=="33",RUN+="/bin/raw /dev/raw/raw2 %M %m" ACTION=="add",KERNEL=="/dev/sdd1",RUN+='/bin/raw /dev/raw/raw3 %N" ACTION=="add",ENV{MAJOR}=="8",ENV{MINOR}=="49",RUN+="/bin/raw /dev/raw/raw3 %M %m" ACTION=="add",KERNEL=="/dev/sde1",RUN+='/bin/raw /dev/raw/raw4 %N" ACTION=="add",ENV{MAJOR}=="8",ENV{MINOR}=="65",RUN+="/bin/raw /dev/raw/raw4 %M %m" ACTION=="add",KERNEL=="/dev/sdf1",RUN+='/bin/raw /dev/raw/raw5 %N" ACTION=="add",ENV{MAJOR}=="8",ENV{MINOR}=="81",RUN+="/bin/raw /dev/raw/raw5 %M %m" KERNEL=="raw[1-5]",OWNER="grid",GROUP="asmadmin",MODE="660" [root@rac1 ~]# start_udev Starting udev: [ OK ] [root@rac1 ~]# ll /dev/raw/ total 0 crw-rw---- 1 grid asmadmin 162, 1 Apr 13 13:51 raw1 crw-rw---- 1 grid asmadmin 162, 2 Apr 13 13:51 raw2 crw-rw---- 1 grid asmadmin 162, 3 Apr 13 13:51 raw3 crw-rw---- 1 grid asmadmin 162, 4 Apr 13 13:51 raw4 crw-rw---- 1 grid asmadmin 162, 5 Apr 13 13:51 raw5 crw-rw---- 1 root disk 162, 0 Apr 13 13:51 rawctl这里需要注意的是配置的,前后都不能有空格，否则会报错。最后看到的raw盘权限必须是grid:asmadmin用户。
方法（3）：
[root@rac1 ~]# for i in b c d e f ; do echo "KERNEL==\"sd*\", BUS==\"scsi\", PROGRAM==\"/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/\$name\", RESULT==\"`/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/sd$i`\", NAME=\"asm-disk$i\", OWNER=\"grid\", GROUP=\"asmadmin\", MODE=\"0660\"">> /etc/udev/rules.d/99-oracle-asmdevices.rules done [root@rac1 ~]# start_udev Starting udev: [ OK ][root@rac1 ~]# ll /dev/*asm*
brw-rw—- 1 grid asmadmin 8, 16 Apr 27 18:52 /dev/asm-diskb
brw-rw—- 1 grid asmadmin 8, 32 Apr 27 18:52 /dev/asm-diskc
brw-rw—- 1 grid asmadmin 8, 48 Apr 27 18:52 /dev/asm-diskd
brw-rw—- 1 grid asmadmin 8, 64 Apr 27 18:52 /dev/asm-diske
brw-rw—- 1 grid asmadmin 8, 80 Apr 27 18:52 /dev/asm-diskf
用这种方式添加，在后面的添加asm磁盘组的时候，需要指定Change Diskcovery Path为/dev/*asm*
10.配置grid用户ssh互信 [root@rac1 ~]#sh-keygen -t rsa [root@rac1 ~]#ssh-keygen -t dsa [root@rac2 ~]#sh-keygen -t rsa [root@rac2 ~]#ssh-keygen -t dsa [root@rac1 ~]#su - grid [grid@RAC1 ~]$ ssh rac1 cat ~/.ssh/id_rsa.pub >> authorized_keys ssh rac2 cat ~/.ssh/id_rsa.pub >> authorized_keys ssh rac1 cat ~/.ssh/id_dsa.pub >> authorized_keys ssh rac2 cat ~/.ssh/id_dsa.pub >> authorized_keys [grid@RAC1 .ssh]$ scp authorized_keys rac2:~/.ssh/ [oracle@RAC1 .ssh]$ chmod 600 authorized_keys 11.挂载安装软件文件夹这里是主机windows系统开启文件夹共享，让后虚拟机挂载即可
mkdir -p /home/grid/db
mount -t cifs -o username=share,password=123456 //192.168.248.1/DB /home/grid/db
mkdir -p /home/oracle/db
mount -t cifs -o username=share,password=123456 //192.168.248.1/DB /home/oracle/db
在Oracle RAC两个节点上安装cvuqdisk，否则，集群验证使用程序就无法发现共享磁盘，当运行（手动运行或在Oracle Grid Infrastructure安装结束时自动运行）集群验证使用程序，会报错“Package cvuqdisk not installed”
注意使用适用于硬件体系结构（x86_64或i386）的cvuqdisk RPM。
cvuqdisk RPM在grid的安装介质上的rpm目录中。
rac1到grid软件目录下执行runcluvfy.sh命令：
[root@rac1 ~]# su - grid [grid@rac1 ~]$ cd db/grid/ [grid@rac1 grid]$ ls doc readme.html rpm runInstaller stage install response runcluvfy.sh sshsetup welcome.html [grid@rac1 grid]$ ./runcluvfy.sh stage -pre crsinst -n rac1,rac2 -fixup -verbose查看cvu报告，修正错误
这里CVU执行的所有其他检查的结果为”passed”，只出现了如下错误：
Checking DNS response time for an unreachable node
Node Name Status
rac2 failed
rac1 failed
PRVF-5637 : DNS response time could not be checked on following nodes: rac2,rac1
File “/etc/resolv.conf” is not consistent across nodes
这个错误是因为没有配置DNS，但不影响安装，后面也会提示resolv.conf错误，我们用静态的scan-ip，所以可以忽略。